In case you thought it might get better...
http://news.bbc.co.uk/1/hi/uk_politics/6462719.stm
Shadow Home Secretary David Davis has called for airport-style screening of passengers at British railway stations to combat terrorism. [...]
So, no sharp objects on trains, you'll have to endure what the buffet car (if any) has to offer in the way of drinks and your bags will end up in Bristol (damaged) when you're in Glasgow.